<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!--2、 为Echarts准备一个具备大小(宽高) 的Dom -->
            <div id="main" style="width: 750px;height:400px;">

            </div>
        </el-card>
    </div>
</template>

<script>
/*1、 导入echarts */
import * as echarts from 'echarts'
import _ from 'lodash'
export default {
    name:'Report',
    data(){
        return{
            /* 需要合并的数据 */
            options: {
                title: {
                text: '用户来源'
                },
                tooltip: {
                trigger: 'axis',
                axisPointer: {
                    type: 'cross',
                    label: {
                    backgroundColor: '#E9EEF3'
                    }
                }
                },
                grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
                },
                xAxis: [
                {
                    boundaryGap: false
                }
                ],
                yAxis: [
                {
                    type: 'value'
                }
                ]
            }
        }
    },

    created(){

    },
    //此时页面上的元素已经被渲染完毕了！
    async mounted() {
        // 3、 基于准备好的dom ，初始化echarts实例
         var myChart = echarts.init(document.getElementById('main'));

        
        const {data: res} = await this.$http.get('reports/type/1');
        if(res.meta.status !== 200){
            return this.$message.error('获取折线图数据失败!');
        }
        //4、 准备数据和配置项
        const result =  _.merge(res.data,this.options);
        
         // 绘制图表 展示数据
        myChart.setOption(result);
    },

    methods: {
        
    },
}
</script>

<style scoped>

</style>